Toshiba e-STUDIO170F Service Manual page 278

Pin No.
148 DSCCK
150 OBACKX
151 ODREQX
152 ODACKX
153 PM22CSX
154 INTPMX
155 IBACKX
156 IDREQX
157 IDACKX
159 PM22CK
162-169 PMID[0]-[7]
171-178 PMOD[0]-[7]
182 X32M
183-190, 192-199 SDD[0]-[15]
202 SDDQMH
203 SDCLK
204 SDCKIN
205 SDCKE
206-209, 211-213, SDA[0]-[11]
223-227
214 SDDQML
215 SDWEX
216 SDCASX
217 SDRASX
218 SDCSX
219, 222 SDBA[0], [1]
230 PTCCK1
231 PTCCK2
232 IDTCLK
e-STUDIO170F Circuit Description
Signal name I/O
O
O
I
O
O
I
O
I
O
O
O
I
I
I/O
O
O
I
O
O
O
O
O
O
O
O
I
I
-
DSC operation clock (16 MHz)
Operation clock for the DSC.
CODEC bus acknowledge 2 signal (Low-active)
Indicates release of the bus to the CODEC.
CODEC DMA request 2 signal (Low-active)
The CODEC makes a request for DMA transfer.
CODEC DMA acknowledge 2 signal (Low-active)
Indicates the start of DMA transfer to the CODEC.
CODEC chip select signal (Low-active)
Selects the CODEC.
CODEC interrupt signal
The CODEC requests the ASIC (Engine controller) to
perform interruption.
CODEC bus acknowledge 1 signal (Low-active)
Indicates release of the bus to the CODEC.
CODEC DMA request 1 signal (Low-active)
The CODEC makes a request for DMA transfer.
CODEC DMA acknowledge 1 signal (Low-active)
Indicates the start of DMA transfer to the CODEC.
CODEC operation clock (32 MHz)
Operation clock for the CODEC.
CODEC output data bus
Bus for data output to CODEC.
CODEC input data bus
Bus for data input from CODEC.
System clock input (32 MHz)
SDRAM data bus
Data bus for the SDRAM (IC1).
SDRAM upper data DQM signal (Low-active)
Masks the SDRAM upper data.
SDRAM operation clock (64 MHz)
SDRAM operation clock detect signal
SDRAM clock enable signal (High-active)
Enables the SDCLK signal inputted in the SDRAM.
SDRAM address bus
Address bus for the SDRAM.
SDRAM lower data DQM signal (Low-active)
Masks the SDRAM lower data.
SDRAM write signal (H: Read, L: Write)
Writes data to the SDRAM or reads data from the
SDRAM.
SDRAM CAS signal (Low-active)
CAS signal for the SDRAM.
SDRAM RAS signal (Low-active)
RAS signal for the SDRAM.
SDRAM chip select signal (Low-active)
Selects the SDRAM.
SDRAM bank address bus
Address bus for the bank memory function of the
SDRAM.
16 dots/mm clock (Facsimile-related clock)
Reference clock for printing in 16 dots/mm (406 dpi).
300/600 dpi clock (Printer-related clock)
Reference clock for printing in 300/600 dpi.
Not used
7 - 48
Function
January 2005 © TOSHIBA TEC